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Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425

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BuyFindarrow_forward

Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425
Textbook Problem
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When an unstable nucleus produces an α particle, by how many units does the atomic number of the nucleus change? Does the atomic number increase or decrease?

Interpretation Introduction

Interpretation:

Interpret the change in atomic number of nuclide in alpha decay.

Concept Introduction:

The decaying of an atom takes place by three type of decay such as alpha decay, beta decay, gama decay.

In alpha decay, an alpha particle with mass 4m and electron 2e removed from nuclide while in beta decay two type of decay are possible beta (+) and beta (-). In gamma decay, nuclide will remain same to the original one.

Explanation

In alpha decay the mass number get reduces by 4 unit which number of electron or atomic number get reduces by 2 unit.

Alpha particle decaying of Rn results in formation of polonium with mass 218 as follows:

86Rn222

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